The 43-year-old woman was entering a long-term rehab program, so she asked her best friend to take care of her finances. But as she cleaned up, she got cleaned out.

Vincent Robert Eppstein - the 49-year-old owner of a San Jose bouncy house business - drained the woman's assets while buying vacations, jewelry, motorcycles and Segway scooters, according to Santa Clara County prosecutors.

Eppstein stole more than $600,000 from the victim's accounts over a four-year period, refinancing two of her properties and selling a third. Confronted, he transferred the last $750 from one account and wrote himself a check for the remaining 60 cents, prosecutors said.

On the check's memo line, Eppstein wrote: "Have a nice life."

A jury convicted Eppstein this week of three counts of grand theft and one count of fraud against a dependent adult, all felonies. He faces up to 11 years in prison when he is sentenced Nov. 18 by Superior Court Judge Teresa Guerrero-Daley.

"It's a sad but sobering truth that in many fraud cases it is friends and family who take advantage of their positions of trust," said Deputy District Attorney Victor Chen. "Pay attention. Be involved. If you are unable to manage your own finances, consider hiring a professional."

Authorities said Eppstein, who had little income of his own, decided to use his friend's money to pay off his own house - while sending her mortgage payments in late. He bought Harley-Davidson motorcycles, Segway electric scooters, a Rolex watch and a diamond engagement ring.

He was also accused of helping himself to expensive vacations in Las Vegas, Florida and Hawaii and buying two tickets for a friend to go to Brazil.

All told, Eppstein stole more than $630,000, money taken from a real estate inheritance entrusted to the victim so that she could take care of her mentally disabled mother, prosecutors said.